Yes and no — there should be enough hooks available to let you write that functionality yourself, and if the hooks aren’t there (or in the “better” version of this plugin) it might be possible to add them.

The approval step would be trickier — you’d need to shortcut this plugin and probably save the response as a custom post type, then add a hook so when that post type is saved (and you’ve changed a category to indicate “approved” status, or however you handle status) it would then trigger the 3rdparty submission.